QT 配置文件操作

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利用QSettings设置配置文件

#include <QSettings>

QSettings setting(QCoreApplication::applicationDirPath()+"/config.ini",QSettings::IniFormat);//判断是否存在配置文件，不存在则新建config.ini
    
    //判断是否存在这样的键值对HostName，Port，UserName，Password
    if(!setting.contains("HostName")||!setting.contains("Port")||!setting.contains("UserName")||!setting.contains("Password"))
    {
        //不存在则创建初值，默认节General
        setting.setValue("HostName","127.0.0.1");
        setting.setValue("Port",3306);
        setting.setValue("UserName","root");
        setting.setValue("Password","123456");
    }
    
    QString HostName = setting.value("HostName").toString();
    int Port = setting.value("Port").toInt();
    
    if(!setting.contains("com1/baud"))//com1为节，baud为键，520为值
        setting.setValue("com1/baud",520); //不存在则创建则赋初值
    qDebug()<<setting.value("com1/baud").toString();